If this was a typical American suburb, I'd be inclined to agree, but you have to realize that your suburb is a statistical anomaly compared to the much more urban suburb that most Americans live in.
For most Americans, a suburb still means being miles from nature, it also means being jammed into row after row of houses butting shoulders with your neighbors. The "true suburb" (i.e., a suburb as it was originally envisioned) is a rare thing.
For these "urban 'burbs" there is really no benefit to the current layout of meandering streets and cul de sacs - it just forces people to drive more, disconnects neighborhoods, and makes transit impossible to provision. There would be very little lost converting these to neighborhoods with a stronger retail presence and sanely laid out streets.
Most of what we're building today are really "exurbs".
I live in the country now and it's even more remote, but when I lived in the 'burbs it was on a 1/2 acre lot behind a nature preserve. I could look out my living room windows and not see anything but trees -- not a neighbor in sight. My kid could climb trees, look for frogs, go "treasure hunting" all day long. The dogs could go outside without needing to be leashed, or walked. And we could have sex on the grass at night.
Much harder to do those things in the city.